Tubular steam-boiler.



H. E. WARD. TUBULAR STEAM BOILER.

APPLICATION FILED NOV. 25, 1907.

Patnted Nov. 17, 1908.

2 SHEETS-SHEET 1.

W11 1 Il H. E. WARD.

TUBULAR STEAM BOILER.

APPLICATION FILED NOV. 25, 1907.

Patented Nov. 17, 1908.

2 SHEET8SHEET 2.

" inn/33%" [70/0/1025] W aid/ HOWARD E. WARD, OF KANSAS CITY, MISSOURI.

TUBULAR STEAM-BOILER.

Specification of Letters Patent.

Patented Nov. 17, 1908.

Application filed November 25, 1907. Serial No. 403,657.

To all whom it may concern:

Be it known that I, HOWARD E. WARD, citizen of the United States, residing at Kansas City, in the county of Jackson and State of Missouri, have invented certain new and useful Improvements in Tubular Steam- Boilers, of which the following is a specification.

This invention relates to tubular steam boilers, and my object is to produce a boiler of this character wherein steam can be generated quickly and therefore economically.

A still further object is to produce a steam boiler of simple, strong, durable and comparatively inexpensive construction.

With these general objects in view and others as hereinafter appear, the invention consists in certain novel and peculiar fea tures of construction and organization as hereinafter described and claimed; and in order that it may be fully understood reference is to be had to the accompanying drawings, in which- Figure 1, is a vertical central section of a tubular boiler embodying my invention. Fig. 2, is a side elevation of the boiler. Fig. 3, is a vertical section of a modified form of the boiler and the furnace walls thereof on the line III-III of Fig. 4. Fig. I, is a horizontal section taken 011 the line IV of Fig. 3. Fig. 5, is a central vertical section of the upper part of the boiler shown by Fig. 3. Fig. 6, is a central vertical section of the rear lower portion of the boiler shown by Fig. 3. Fig. 7, is an enlarged vertical section of the boiler taken through one end of the substantially horizontal longitudinally extending water tubes and also shows a wall or sheet brace in connection therewith. Fig. 8 is a detail perspective view of the fastening for the tie-rod inserted through one of the boiler-tubes.

In the drawings, 1 indicates headers connected by and communicating with a pair of oppositely disposed drums 2, at their lower ends and connected by and communicating with a drum 3 at their upper ends arranged vertically above and bridging the space between the drums 2, the drum 3 being preferably stifl'ened by brace rods 4. The rear header is provided in alinement with drums 2 with man-holes 5 of ordinary or any preferred construction and with a similar manhole 6 controlling access to drum 3, 7 indieating cross tubes connecting drums 2 and in practice adapted to be pitched downward slightly in one direction as usual, though not so shown, to facilitate the circulation from one of said drums to the other, and said drums are also connected with drum 3 by the upwardly converging sets of tubes 8, up through one set of which the water circulates from one drum 2 to the drum 3 and then down through the other set into the opposite drum 2.

9 indicates longitudinal water tubes connecting the headers between the three sets of tubes referred to, these tubes as well as those previously referred to being preferably arranged in staggered relation in order to compel the products of combustion to impinge upon all of the tubes and thus generate steam in the shortest possible time, it being understood that the grate (not shown) is disposed below tubes 7 so that the flame shall impinge upon said tubes and thread its way up between tubes 9 to drum 3 and also outwardly in both directions between the tubes 8, it being also understood that the flame will pass up around the outer sides of drums 2 and eventually up around drum 3. To indicate the external circulation of heat more clearly, the side walls of the furnace are indicated by dotted lines at 10 and the stack at 11.

12 indicates tie rods of the usual type connecting the headers and arranged between the longitudinal tubes 9, it being also understood that similar tie rods may connect the drums between the tubes 7 and 8 if desired, the advisability of the use of tie rods be tween the drums being determined by the size of the boiler.

The headers are provided with handhole openings 13 shown only in Fig. 7 to give access to tubes 9 to enable the boilermaker to form the usual pross or projection on each end of each tube at one side of the adjacent wall or sheet and the usual bead at the opposite side of the said sheet as shown in' Fig. 7, it being understood that it is unnecessary to have a handhole opposite each tube but that it is necessary to have sufficient handholes to give access to all of the tubes. The handholes are' closed by the usual handhole plates 14.

As an auxiliary method of bracing the walls or sheets of the headers, I arrange rods 15 in some of the tubes 9, provided with hooked or looped ends 15 disposed in the headers and equip said rods with spiders 16 to bear against the walls or sheets without obstructing the communication between the tubes and the headers, wedge keys 17 being forced into said hooked or looped ends and against the spiders to clamp the latter firmly against the said sheets as shown in Fig. 7, it being obvious that the appliances used in this method of bracing are inserted through the handholes 13.

Referring to Figs. 3 to 6 inclusive which illustrate a modified form of the boiler, 18 indicates headers of substantially diamond shape in end view, 19 is a drum connecting and communicating with the headers 18 at their lower ends, and 20 is a pair of oppositely disposed drums connecting the headers near their upper ends,- and preferably of angular form and uniform cross sectional area. The drum 19 is connected to the lower arms of the angular drums 20 by upwardly diverging sets of water tubes 21 and the upwardly projecting arms of drums 20, are connected by transverse tubes 22, and connecting the headers between said tubes 21 and 22 are longitudinal tubes 23. It will be seen as thus far described, the boiler shown in Fig. 3 is practically of thesame construction as the boiler shown in Fig. 1, except that it is inverted with respect to the latter, in the fact that the drums 20 have their outer walls substantially paralleling their inner walls instead of bowed outwardly therefrom as in the drums 2 of Fig. 1. The headers in Fig. 3 are also connected vertically above tubes 22 by a steam drum 24, and the drum 19 is equipped with a vertical series of combustion flues 25, said series terminating short of the rear header (see Fig. 6) to enable the boiler maker crawling through the manhole 26 in the rear header, to enter the drum 19 at either side of the series of fiues for any purpose desired, the said manhole being closed by the usual manhole plate 27.

28 indicates a series of flame spreaders arranged in longitudinal alinement above drum 19 and below the series of tubes 23, the said plates being secured upon the heads 29 of stems 3O screwed or otherwise secured with a water-tight joint in the top wall of drum 19.

31 is a battle-plate extending from the rear header to within a suitable distance of the front header and interposed between the series of fines 22. and 23.

32 is an arch secured to and between the upwardly projecting arms of drums 20 and to the headers, and inclosing the steam drum 24:.

33 is a stack secured to the arch 32 and communicating with the chamber thereof near the rear header.

34 and 35 respectively are handhole plates closing the handholes in the outer walls of drums 20 opposite the upper ends of tubes 21 and 22, it being understood that each tube 21 and 22 as well as each tube 23 and each of the tubes 7 and 8 and 12, Figs. 1 and 2, are

' formed with a pross or projection and a bead at opposite sides of the plates which they respectively connect, though not so shown because such construction is old and well known, and of the small scale on which the tubes appear in all of the figures except Fi 7.

3%6 indicates the side walls of the furnace of the construction shown on sheet 2, said walls being secured in any suitable manner to the lower arms of drums 20, and 37 indicates the end walls connecting theends of walls 36 with the edges of the headers below said drums 20.

38 are shorter walls between and parallel with walls 36 and provided near their front ends with grooves 39 and near their rear.

ends with wider grooves L0 establishing communication between the combustion CllZLHl ber below the drum 19 and the chambers at opposite sides of tubes 21, 41 indicating plates bridging the space between the upper ends of walls 38 and walls 36 to prevent heat from passing downward at the outer sides of walls 38. V

In practice the flame from the grate (not shown) in the combustion chamber, passes up through fines 25 and also up through grooves 39 and 40 in walls 38, the flame which passes up through the fines being spread laterally by the spreaders 28 and thence threading its way up between tubes 23, the flame which passes up through the grooves threading its way inwardly between the tubes 21 and thence between tubes 23. The flame impinges upon the baffle plate 31 and passes up at the rear end of the same to the space occupied by tubes 22 between which it threads its way and envelops the steam drum and eventually escapes through stack 33.

From the above description it will be apparent that I have produced a tubular steam boiler possessing the desirable features enumerated and I wish it to be understood that I do not desire to be limited to the exact details of construction shown and described as obvious modifications will occur to one skilled in the art.

Having thus described the invention what I claim as new and desire to secure by Letters Patent, is

1. A steam boiler comprising a pair of headers, a pair of drums connecting the headers, a third drum below the pair of drums and also connecting the headers, tubes connecting said drums, and fines extending transversely through the lower drum.

2. A steam boiler comprising a pair of headers, a pair of drums connecting the headers, a third drum below the pair of drums also connecting the headers, tubes connecting the drums, fines extending through the lower drum, and deflectors mounted upon said drum above said flues.

3. The combination of a pair of headers, 5. In a steam boiler, a pair of walls, a tube a tube extending between the headers and connecting and secured to said walls, a rod terminating therein, a rod inserted through extending through said tube, and terminatthe tube and having its ends within the ing in hooks, spiders fitting on the rod and headers, and means mounted on the ends of bearing against said walls, and wedges inthe rod and bearing upon the inner Walls of terposed between said hooks and spiders to the headers to secure the rods. clamp the latter firmly against said walls.

4. In a steam boiler, a pair of walls, a tube In testimony whereof I affix my signature, connecting and secured to said walls, a rod in the presence of two witnesses.

extending through said tube, spiders fitting HOWARD E. WARD. on the rod and bearing against said walls, Witnesses: and wedges engaging the spiders and rods to H. G. RODGERS,

clamp the former firmly against said Walls. G. Y. THORPE. 

